Abstract: The invention relates to hot-dip cast aluminum alloy for anticorrosion treatment on engineering parts resistant to marine climate and a preparation method thereof, wherein said cast aluminum alloy contains Al, Zn, Si, Mg, RE, Ti, Ni and nanometer oxide particle reinforcing agent, said nanometer oxide particle reinforcing agent is selected from one or two of TiO2 and CeO2, the mass percentage of the components is as follows: Zn: 35-58%, Si: 0.3-4.0%, Mg: 0.1-5.0%, RE: 0.02-1.0%, Ti: 0.01-0.5%, Ni: 0.1-3.0%, and the total content of the nanometer oxide particle reinforcing agent: 0.01-1.0%; and the balance consists of Al and unavoidable impurities. The coating using cast aluminum alloy prepared by the invention has sufficient corrosion resistance and scour resistance in marine climate.

Abstract: The present invention relates to a method for diffusion treatment of a coating on an engineering part resistant to marine climate, comprising: Step 1. pretreating the part; Step 2. preheating the part in a protective atmosphere furnace; Step 3. immersing the pre-heated part in a plating solution in a way that the part is rotated in the submerging process; Step 4. carrying out diffusion treatment, i.e., placing the immersion-plated part into a vacuum furnace, maintaining at 800 to 950° C. for 1 to 3 hours, and then cooling it down prior to discharge, such that atoms at an interface are diffused to form a diffusion layer on a substrate, achieving metallurgical bonding between the coating and the substrate. Treatment by the method of the present invention enables the part to have full resistance to corrosion and scouring erosion under marine climate.

Abstract: The invention relates to a special hot-dip plating alloy for a coating on the surface of a titanium alloy part, wherein the hot-dip plating alloy contains the following components by mass percentage: 8-24% of Si, 1.2-3.1% of Zn, 0.02-0.5% of RE, 0.5-3.2% of Mg, 0.05-1% of Fe, 0.05-0.5% of Cu, 1.0-2.0% of Mn, 0.5-2.0% of Cr, 0.02-0.5% of Zr, 1-2% of nano-oxide particle reinforcing agent and the balance of Al and inevitable impurities, and the nano-oxide particle reinforcing agent is selected from one or two of TiO2 and CeO2. The adoption of the hot-dip plating alloy produced by the invention can form the coating which has corrosion resistance and good wear resistance, and is well metallurgically bonded with a matrix on the surface of the titanium alloy.

Abstract: The invention relates to a method for preparing a coating resistant to contact corrosion on the surface of titanium alloy, which comprises the following steps: 1. carrying out degreasing and derusting to a titanium alloy part; 2. carrying out etching treatment on the titanium alloy part; 3. carrying out surface activation treatment on the titanium alloy part; 4. preheating the titanium alloy part in an atmosphere protection furnace; 5. immersing the preheated titanium alloy part in plating solution; and 6. carrying out diffusion treatment on the immersion-plated titanium alloy part in a vacuum furnace whereby atoms at the interface diffuse to form a diffusion layer on a substrate and thus form a plating diffusion composite layer on the surface of the titanium alloy part. The part treated by the method completely solves the problem of contact corrosion of titanium alloy contacting with aluminum alloy and steel material.

Abstract: The invention relates to a method for carrying out the diffusion treatment on the coating of engineering parts resistant to marine climate. The method comprises the following steps: 1. pre-treating the parts; 2. pre-heating the parts in a protective atmosphere furnace; 3. immersing the pre-heated parts in a plating solution in away that the parts are rotated in the submerging process; 4. undergoing the diffusion treatment, particularly, putting the immersion-plated parts into a vacuum furnace, holding at 800 to 950 DEG C for 1 to 3 hours, then reducing the temperature gradually and taking out the parts, and forming a diffusion layer on a substrate through the diffusion of atoms at the interface to achieve the metallurgical combination between the coating and the substrate. The parts treated by the method of the invention are highly resistant to corrosion and scouring erosion under the condition of marine climate.

Abstract: The invention relates to a special hot-dip plating alloy for a coating on the surface of a titanium alloy part, wherein the hot-dip plating alloy contains the following components by mass percentage: 8-24% of Si, 1.2-3.1% of Zn, 0.02-0.5% of RE, 0.5-3.2% of Mg, 0.05-1% of Fe, 0.05-0.5% of Cu, 1.0-2.0% of Mn, 0.5-2.0% of Cr, 0.02-0.5% of Zr, 1-2% of nano-oxide particle reinforcing agent and the balance of Al and inevitable impurities, and the nano-oxide particle reinforcing agent is selected from one or two of TiO2 and CeO2. The adoption of the hot-dip plating alloy produced by the invention can form the coating which has corrosion resistance and good wear resistance, and is well metallurgically bonded with a matrix on the surface of the titanium alloy.

Abstract: The invention relates to a method for preparing a coating resistant to contact corrosion on the surface of titanium alloy, which comprises the following steps: 1. carrying out degreasing and derusting to a titanium alloy part; 2. carrying out etching treatment on the titanium alloy part; 3. carrying out surface activation treatment on the titanium alloy part; 4. preheating the titanium alloy part in an atmosphere protection furnace; 5. immersing the preheated titanium alloy part in plating solution; and 6. carrying out diffusion treatment on the immersion-plated titanium alloy part in a vacuum furnace whereby atoms at the interface diffuse to form a diffusion layer on a substrate and thus form a plating diffusion composite layer on the surface of the titanium alloy part. The part treated by the method completely solves the problem of contact corrosion of titanium alloy contacting with aluminum alloy and steel material.

Abstract: The invention relates to hot-dip cast aluminum alloy for anticorrosion treatment on engineering parts resistant to marine climate and a preparation method thereof, wherein said cast aluminum alloy contains Al, Zn, Si, Mg, RE, Ti, Ni and nanometer oxide particle reinforcing agent, said nanometer oxide particle reinforcing agent is selected from one or two of TiO2 and CeO2, the mass percentage of the components is as follows: Zn: 35-58%, Si: 0.3-4.0%, Mg: 0.1-5.0%, RE: 0.02-1.0%, Ti: 0.01-0.5%, Ni: 0.1-3.0%, and the total content of the nanometer oxide particle reinforcing agent: 0.01-1.0%; and the balance consists of Al and unavoidable impurities.